i dont think its allowed to use the terms "economy" and "performance" in the same sentence especially if we are talking about the X...
i dont know about the wedge but i do know that the RD grate is awesome in performance.

i dont think its allowed to use the terms "economy" and "performance" in the same sentence especially if we are talking about the X...
i dont know about the wedge but i do know that the RD grate is awesome in performance.

Well technically speaking, when you are building a performance engine you are trying to make it as efficient as possible, its just that you are trying to turn as much fuel into HP as possible instead of turning that fuel into miles traveled.